extremely

adverb

ex·​treme·​ly ik-ˈstrēm-lē 

1

: in an extreme manner

2

: to an extreme extent

Synonyms of extremely

• very
• incredibly
• terribly
• highly
• too
• so
• badly
• damned
• severely
• damn
• really
• super
• desperately
• intensely
• seriously
• far
• exceptionally

Examples of extremely in a Sentence

an extremely hot day

Recent Examples on the Web

Naegleria fowleri infections are extremely rare, with only 180 confirmed between 1937 and 2025, according to the Louisiana Department of Health. — Diego Mendoza, CNN Money, 24 Aug. 2026

The reentry bodies are designed to protect the warhead during storage, launch, spaceflight, and the extremely hot, violent return through the atmosphere. — Christopher McFadden, Interesting Engineering, 23 Aug. 2026

The first year of scaling the language-learning platform was extremely tight. — Emma Burleigh, Fortune, 23 Aug. 2026

The United States has extremely capable engineers, manufacturing expertise and a lot of determination. — John Koetsier, Forbes.com, 22 Aug. 2026

Word History

First Known Use

1509, in the meaning defined at sense 1

Phrases Containing extremely

• extremely high frequency
• extremely low frequency

Rhymes for extremely

• seemly
• unseemly